PDF(Pubmed)
Abstract：
BACKGROUND: The aim of our study was to evaluate the impact of the ActTeens Program on physical activity and health-related physical fitness among adolescents in Brazil.
METHODS: The \"ActTeens Program\" was conducted using a cluster-randomized controlled trial during 24-week school term. The sample consisted of 317 adolescents (52.7% girls; 13.61 ± 0.70 years) from four secondary schools that were randomly assigned to intervention group (N = 169) or control group (N = 148). This school-based physical activity (PA) intervention involved two components: (i) structured physical activity sessions delivered within physical education (PE) and (ii) healthy lifestyle guidance (mHealth). The primary outcome was PA assessed using Physical Activity Questionnaire for Adolescents (PAQ-A); secondary outcomes included muscular (MF) and cardiorespiratory fitness (CRF) assessed using 90-push-up, handgrip dynamometer, standing long jump, and 20 m PACER shuttle run test. Assessments were conducted at baseline, 12- and 24-week. Intervention effects were assessed using linear mixed models (LMM).
RESULTS: For the primary outcome (PA), no significant group-by-time effects were observed for physical education based-PA (0.3 score; 95%CI: -0.1; 0.6; and - 0.01 score; 95%CI: -0.03; 0.03, at 12-wk and 24-wk respectively) and total PA (-0.02 score; 95%CI: -0.2; 0.2; and - 0.01score; 95%CI: -0.2; 0.2, at 12 and 24 weeks respectively). After 24 weeks, we observed a significant group by time effects for lower body muscular fitness (12.9 cm; 95%CI, 3.2 to 22.2).
CONCLUSIONS: The implementation of aerobic and muscle-strengthening exercises used in the ActTeens intervention did not lead to improvements in physical activity. The intervention resulted in improved lower body muscular fitness, however, we found no significant differences for upper body muscular and cardiorespiratory fitness.
METHODS: The \"ActTeens Program\" was conducted using a cluster-randomized controlled trial during 24-week school term. The sample consisted of 317 adolescents (52.7% girls; 13.61 ± 0.70 years) from four secondary schools that were randomly assigned to intervention group (N = 169) or control group (N = 148). This school-based physical activity (PA) intervention involved two components: (i) structured physical activity sessions delivered within physical education (PE) and (ii) healthy lifestyle guidance (mHealth). The primary outcome was PA assessed using Physical Activity Questionnaire for Adolescents (PAQ-A); secondary outcomes included muscular (MF) and cardiorespiratory fitness (CRF) assessed using 90-push-up, handgrip dynamometer, standing long jump, and 20 m PACER shuttle run test. Assessments were conducted at baseline, 12- and 24-week. Intervention effects were assessed using linear mixed models (LMM).
RESULTS: For the primary outcome (PA), no significant group-by-time effects were observed for physical education based-PA (0.3 score; 95%CI: -0.1; 0.6; and - 0.01 score; 95%CI: -0.03; 0.03, at 12-wk and 24-wk respectively) and total PA (-0.02 score; 95%CI: -0.2; 0.2; and - 0.01score; 95%CI: -0.2; 0.2, at 12 and 24 weeks respectively). After 24 weeks, we observed a significant group by time effects for lower body muscular fitness (12.9 cm; 95%CI, 3.2 to 22.2).
CONCLUSIONS: The implementation of aerobic and muscle-strengthening exercises used in the ActTeens intervention did not lead to improvements in physical activity. The intervention resulted in improved lower body muscular fitness, however, we found no significant differences for upper body muscular and cardiorespiratory fitness.
摘要：
背景：我们研究的目的是评估ActTeens计划对巴西青少年身体活动和健康相关体质的影响。
方法：“ActTeens计划”是在为期24周的学期中使用整群随机对照试验进行的。样本包括来自四所中学的317名青少年（52.7％的女孩；13.61±0.70岁），这些青少年被随机分配到干预组（N=169）或对照组（N=148）。这种基于学校的体育活动（PA）干预措施涉及两个组成部分：（i）在体育教育（PE）中进行的结构化体育活动课程和（ii）健康生活方式指导（mHealth）。主要结果是使用青少年身体活动问卷（PAQ-A）评估PA；次要结果包括使用90次俯卧撑评估的肌肉（MF）和心肺健康（CRF）。手柄测力计,站立跳远，和20米PACER穿梭运行测试。在基线时进行评估，12周和24周。使用线性混合模型（LMM）评估干预效果。
结果：对于主要结果（PA），对于基于体育教育的PA(0.3分;95CI:-0.1;0.6;和-0.01分;95CI:-0.03;0.03,分别在12周和24周)和总PA(-0.02分;95CI:-0.2;0.2;和-0.01分;95CI:-0.2;0.2,分别在12周和24周),未观察到显著的分组效应。24周后,我们观察到下半身肌肉适应度有显著的时间效应(12.9cm;95CI,3.2~22.2).
结论：在ActTeens干预中实施有氧和肌肉强化运动并没有导致身体活动的改善。干预措施改善了下半身肌肉健康，然而,我们发现上身肌肉和心肺适应性没有显著差异.
方法：“ActTeens计划”是在为期24周的学期中使用整群随机对照试验进行的。样本包括来自四所中学的317名青少年（52.7％的女孩；13.61±0.70岁），这些青少年被随机分配到干预组（N=169）或对照组（N=148）。这种基于学校的体育活动（PA）干预措施涉及两个组成部分：（i）在体育教育（PE）中进行的结构化体育活动课程和（ii）健康生活方式指导（mHealth）。主要结果是使用青少年身体活动问卷（PAQ-A）评估PA；次要结果包括使用90次俯卧撑评估的肌肉（MF）和心肺健康（CRF）。手柄测力计,站立跳远，和20米PACER穿梭运行测试。在基线时进行评估，12周和24周。使用线性混合模型（LMM）评估干预效果。
结果：对于主要结果（PA），对于基于体育教育的PA(0.3分;95CI:-0.1;0.6;和-0.01分;95CI:-0.03;0.03,分别在12周和24周)和总PA(-0.02分;95CI:-0.2;0.2;和-0.01分;95CI:-0.2;0.2,分别在12周和24周),未观察到显著的分组效应。24周后,我们观察到下半身肌肉适应度有显著的时间效应(12.9cm;95CI,3.2~22.2).
结论：在ActTeens干预中实施有氧和肌肉强化运动并没有导致身体活动的改善。干预措施改善了下半身肌肉健康，然而,我们发现上身肌肉和心肺适应性没有显著差异.
